10,293 people (2024 Census estimate, +0.5% since 2020)
643 square miles of land · 16 people per square mile
“Highest” and “lowest” are just order, not grades: a high rank for poverty or hazard losses means more of it. Each figure's source is in its section below.
10 active community water systems list Johnston County in the area they serve, reporting 9,789 people served in all (a system that crosses county lines counts its whole population).
| TISHOMINGO MUNICIPAL AUTHORITY surface water · local government · OK1010815 | 3,000 served |
| JOHNSTON CO RWD #3 groundwater · local government · OK2003511 | 2,783 served |
| MURRAY STATE COLLEGE surface water · state · OK1010816 | 1,150 served |
| JOHNSTON CO RWS& SWMD #4 groundwater · local government · OK2003503 | 600 served |
| MANNSVILLE PUBLIC WORKS AUTHORITY groundwater · local government · OK2003505 | 587 served |
| RAVIA groundwater · local government · OK2003504 | 459 served |
| WAPANUCKA groundwater · local government · OK2003518 | 420 served |
| MILBURN PUBLIC WORKS AUTHORITY buys groundwater · local government · OK2003520 | 317 served |
Source: U.S. EPA Safe Drinking Water Information System (SDWIS), active community systems, . Look up any system's violations and test results with EPA's search using its ID.
About 46 people were held in Johnston County's jail, in Vera's latest figure (2023), or 725 per 100,000 residents ages 15–64. In 2018 it was about 51.
Source: Vera Institute of Justice, Incarceration Trends (built from federal Bureau of Justice Statistics jail surveys). Counties without their own jail, or that share one, may show no figure.
7 school districts have their office in Johnston County. School taxes are usually the largest part of a property tax bill.
Spent $10.9 million — $10 million to run schools, about $12,006 per student, plus $862,000 on buildings and equipment. Money in: $4.7 million local (mostly property tax), $4.6 million state, $2.8 million federal. Long-term debt: $2.5 million.
Spent $3 million — $2.6 million to run schools, about $12,386 per student, plus $304,000 on buildings and equipment. Money in: $1.2 million local (mostly property tax), $1.4 million state, $490,000 federal. Long-term debt: $670,000.
Spent $2.9 million — $2.8 million to run schools, about $13,731 per student, plus $90,000 on buildings and equipment. Money in: $3.1 million local (mostly property tax), $443,000 state, $567,000 federal. Long-term debt: $1.2 million.
Spent $3.6 million — $3.6 million to run schools, about $17,692 per student, plus $73,000 on buildings and equipment. Money in: $1.4 million local (mostly property tax), $1.4 million state, $773,000 federal. Long-term debt: $438,000.
Spent $2.4 million — $2.3 million to run schools, about $12,195 per student, plus $59,000 on buildings and equipment. Money in: $1.1 million local (mostly property tax), $1 million state, $530,000 federal. Long-term debt: $255,000.
Spent $1.4 million — $1.4 million to run schools, about $13,727 per student. Money in: $632,000 local (mostly property tax), $397,000 state, $300,000 federal.
Spent $1.2 million — $1.2 million to run schools, about $16,459 per student, plus $20,000 on buildings and equipment. Money in: $569,000 local (mostly property tax), $494,000 state, $229,000 federal.
Source: U.S. Census Bureau, 2023 Annual Survey of School System Finances. Districts are listed by the county of their main office; some serve neighboring counties too.
Source: County Health Rankings & Roadmaps 2025 (University of Wisconsin Population Health Institute), which gathers federal data (CDC, Census, and others); measures cover different recent years. Blank lines aren't reported for small counties.
Overall risk: Very Low compared with other U.S. counties. FEMA estimates natural hazards cost Johnston County about $5.5 million a year on average in buildings, crops and lives. Ability to bounce back (community resilience): Relatively Low; social vulnerability: Very High.
Source: FEMA National Risk Index (December 2025), expected annual loss. Ratings compare counties nationwide; they're estimates, not predictions.
154 bridges in Johnston County: 54 in good condition, 94 fair, and 6 poor (3.9%). “Poor” means a main part — the deck, the beams, or the supports — is rated 4 or lower on the federal 0–9 scale. It doesn't mean unsafe to drive; unsafe bridges are closed.
| 3542C over CREEK · built 1984 | 140 vehicles a day |
| E1870 over SANDY CREEK · built 1940 | 100 vehicles a day |
| E1917 over CREEK · built 1948 | 100 vehicles a day |
| E1954 over CAMP CREEK · built 1946 | 50 vehicles a day |
| OLD ST. HWY. 22 over BIG SANDY CREEK · built 1920 | 35 vehicles a day |
| E1880 over CREEK · built 1968 | 24 vehicles a day |
Source: Federal Highway Administration, National Bridge Inventory (2025 submission). Includes state, county and city bridges.
Federal grants paid for $21.4 million of work in Johnston County in fiscal 2025, about $2,088 per resident — to the county, cities, schools, hospitals, nonprofits and others.
Source: USAspending.gov, grants by place of performance, fiscal 2025 (Oct. 2024 to Sept. 2025). Search it by county to see each award.
From Grants.gov: posted grants listing county governments as eligible, soonest deadline first; research-only and overseas programs left out; list updated 2026-10-13, refreshed weekly. 62 are open in all. Cities, towns, school districts and nonprofits have their own lists there.
Registration deadlines, early voting and polling places for Oklahoma are on the federal site vote.gov, which links to the state's official election office.
The budget, property tax rates, audits, local officials and offices for Johnston County come from the county's own records, which we haven't gathered — not gathered, never hidden. See what a full county site looks like, or ask to have Johnston County built: brayden.ozark@gmail.com.
More of Oklahoma: the state government and every county in Oklahoma.
Nearby counties: Marshall County (21 mi) · Murray County (27 mi) · Coal County (28 mi) · Pontotoc County (28 mi) · Bryan County (33 mi) · Atoka County (36 mi).